WGU D236 Objective Assessment Pathophysiology
Verified Multiple Choice and Conceptual Actual
Emended Exam Questions With Reviewed 100%
Correct Detailed Answers & Rationale
Guaranteed Pass!!Current Update
1. Which of the following best describes hydrostatic pressure?
a) Pulling force exerted by plasma proteins
b) Pushing force exerted by water in the bloodstream
c) Pressure created by dissolved solutes
d) Force generated by the heart during systole
Answer: b) Pushing force exerted by water in the bloodstream
2. Osmotic pressure is primarily determined by:
a) Plasma proteins
b) Electrolytes and solutes in the solution
c) Water content alone
d) Carbon dioxide levels
Answer: b) Electrolytes and solutes in the solution
3. Which protein is primarily responsible for oncotic (colloid osmotic) pressure in
the blood?
a) Hemoglobin
b) Globulin
,c) Albumin
d) Fibrinogen
Answer: c) Albumin
4. What is the normal range for serum albumin levels?
a) 2.1–2.8 g/dL
b) 3.1–4.3 g/dL
c) 4.5–5.5 g/dL
d) 1.0–2.0 g/dL
Answer: b) 3.1–4.3 g/dL
5. A plasma osmolality of 310 mOsm/kg indicates:
a) Normal hydration
b) Severe overhydration
c) Dehydration
d) Hyponatremia
Answer: c) Dehydration
6. Which is the correct normal plasma osmolality range?
a) 270–280 mOsm/kg
b) 282–295 mOsm/kg
c) 300–320 mOsm/kg
d) 250–265 mOsm/kg
Answer: b) 282–295 mOsm/kg
7. The renin-angiotensin-aldosterone system (RAAS) primarily causes:
a) Vasodilation and sodium excretion
b) Vasoconstriction and sodium/water retention
,c) Decreased blood pressure
d) Increased potassium retention
Answer: b) Vasoconstriction and sodium/water retention
8. Which natriuretic peptide is produced by the ventricles?
a) ANP
b) BNP
c) CNP
d) DNP
Answer: b) BNP
9. Edema is best defined as:
a) Fluid accumulation within the intracellular space
b) Fluid accumulation in the interstitial tissues
c) Increased plasma osmolality
d) Reduced hydrostatic pressure
Answer: b) Fluid accumulation in the interstitial tissues
10. What is the normal blood pH range?
a) 7.20–7.30
b) 7.30–7.35
c) 7.35–7.45
d) 7.45–7.55
Answer: c) 7.35–7.45
11. Which buffer system is the largest in the body?
a) Phosphate buffer
b) Protein buffer system
, c) Carbonic acid–bicarbonate buffer
d) Ammonia buffer system
Answer: b) Protein buffer system
12. The phosphate buffer system primarily acts by:
a) Binding sodium
b) Releasing carbon dioxide
c) Taking on acidic forms (H⁺)
d) Generating albumin
Answer: c) Taking on acidic forms (H⁺)
13. Which is the primary chemical buffer system in blood pH regulation?
a) Hemoglobin buffer system
b) Ammonia buffer system
c) Carbonic acid–bicarbonate buffer
d) Sodium-potassium pump
Answer: c) Carbonic acid–bicarbonate buffer
14. How do the lungs help regulate pH?
a) By excreting HCO₃⁻
b) By altering CO₂ levels through ventilation
c) By directly filtering H⁺
d) By secreting aldosterone
Answer: b) By altering CO₂ levels through ventilation
15. If a patient is hypoventilating, what change in pH would most likely occur?
a) Increased pH (alkalosis)
b) Decreased pH (acidosis)
Verified Multiple Choice and Conceptual Actual
Emended Exam Questions With Reviewed 100%
Correct Detailed Answers & Rationale
Guaranteed Pass!!Current Update
1. Which of the following best describes hydrostatic pressure?
a) Pulling force exerted by plasma proteins
b) Pushing force exerted by water in the bloodstream
c) Pressure created by dissolved solutes
d) Force generated by the heart during systole
Answer: b) Pushing force exerted by water in the bloodstream
2. Osmotic pressure is primarily determined by:
a) Plasma proteins
b) Electrolytes and solutes in the solution
c) Water content alone
d) Carbon dioxide levels
Answer: b) Electrolytes and solutes in the solution
3. Which protein is primarily responsible for oncotic (colloid osmotic) pressure in
the blood?
a) Hemoglobin
b) Globulin
,c) Albumin
d) Fibrinogen
Answer: c) Albumin
4. What is the normal range for serum albumin levels?
a) 2.1–2.8 g/dL
b) 3.1–4.3 g/dL
c) 4.5–5.5 g/dL
d) 1.0–2.0 g/dL
Answer: b) 3.1–4.3 g/dL
5. A plasma osmolality of 310 mOsm/kg indicates:
a) Normal hydration
b) Severe overhydration
c) Dehydration
d) Hyponatremia
Answer: c) Dehydration
6. Which is the correct normal plasma osmolality range?
a) 270–280 mOsm/kg
b) 282–295 mOsm/kg
c) 300–320 mOsm/kg
d) 250–265 mOsm/kg
Answer: b) 282–295 mOsm/kg
7. The renin-angiotensin-aldosterone system (RAAS) primarily causes:
a) Vasodilation and sodium excretion
b) Vasoconstriction and sodium/water retention
,c) Decreased blood pressure
d) Increased potassium retention
Answer: b) Vasoconstriction and sodium/water retention
8. Which natriuretic peptide is produced by the ventricles?
a) ANP
b) BNP
c) CNP
d) DNP
Answer: b) BNP
9. Edema is best defined as:
a) Fluid accumulation within the intracellular space
b) Fluid accumulation in the interstitial tissues
c) Increased plasma osmolality
d) Reduced hydrostatic pressure
Answer: b) Fluid accumulation in the interstitial tissues
10. What is the normal blood pH range?
a) 7.20–7.30
b) 7.30–7.35
c) 7.35–7.45
d) 7.45–7.55
Answer: c) 7.35–7.45
11. Which buffer system is the largest in the body?
a) Phosphate buffer
b) Protein buffer system
, c) Carbonic acid–bicarbonate buffer
d) Ammonia buffer system
Answer: b) Protein buffer system
12. The phosphate buffer system primarily acts by:
a) Binding sodium
b) Releasing carbon dioxide
c) Taking on acidic forms (H⁺)
d) Generating albumin
Answer: c) Taking on acidic forms (H⁺)
13. Which is the primary chemical buffer system in blood pH regulation?
a) Hemoglobin buffer system
b) Ammonia buffer system
c) Carbonic acid–bicarbonate buffer
d) Sodium-potassium pump
Answer: c) Carbonic acid–bicarbonate buffer
14. How do the lungs help regulate pH?
a) By excreting HCO₃⁻
b) By altering CO₂ levels through ventilation
c) By directly filtering H⁺
d) By secreting aldosterone
Answer: b) By altering CO₂ levels through ventilation
15. If a patient is hypoventilating, what change in pH would most likely occur?
a) Increased pH (alkalosis)
b) Decreased pH (acidosis)
